blob: a424869707a5225b1f04e9d2e070a87d1987f19a [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * Linux Ethernet device driver for the 3Com Etherlink Plus (3C505)
3 * By Craig Southeren, Juha Laiho and Philip Blundell
4 *
5 * 3c505.c This module implements an interface to the 3Com
6 * Etherlink Plus (3c505) Ethernet card. Linux device
7 * driver interface reverse engineered from the Linux 3C509
8 * device drivers. Some 3C505 information gleaned from
9 * the Crynwr packet driver. Still this driver would not
10 * be here without 3C505 technical reference provided by
11 * 3Com.
12 *
13 * $Id: 3c505.c,v 1.10 1996/04/16 13:06:27 phil Exp $
14 *
15 * Authors: Linux 3c505 device driver by
16 * Craig Southeren, <craigs@ineluki.apana.org.au>
17 * Final debugging by
18 * Andrew Tridgell, <tridge@nimbus.anu.edu.au>
19 * Auto irq/address, tuning, cleanup and v1.1.4+ kernel mods by
20 * Juha Laiho, <jlaiho@ichaos.nullnet.fi>
21 * Linux 3C509 driver by
22 * Donald Becker, <becker@super.org>
23 * (Now at <becker@scyld.com>)
24 * Crynwr packet driver by
25 * Krishnan Gopalan and Gregg Stefancik,
26 * Clemson University Engineering Computer Operations.
27 * Portions of the code have been adapted from the 3c505
28 * driver for NCSA Telnet by Bruce Orchard and later
29 * modified by Warren Van Houten and krus@diku.dk.
30 * 3C505 technical information provided by
31 * Terry Murphy, of 3Com Network Adapter Division
32 * Linux 1.3.0 changes by
33 * Alan Cox <Alan.Cox@linux.org>
34 * More debugging, DMA support, currently maintained by
35 * Philip Blundell <philb@gnu.org>
36 * Multicard/soft configurable dma channel/rev 2 hardware support
37 * by Christopher Collins <ccollins@pcug.org.au>
38 * Ethtool support (jgarzik), 11/17/2001
39 */
40
41#define DRV_NAME "3c505"
42#define DRV_VERSION "1.10a"
43
44
45/* Theory of operation:
46 *
47 * The 3c505 is quite an intelligent board. All communication with it is done
48 * by means of Primary Command Blocks (PCBs); these are transferred using PIO
49 * through the command register. The card has 256k of on-board RAM, which is
50 * used to buffer received packets. It might seem at first that more buffers
51 * are better, but in fact this isn't true. From my tests, it seems that
52 * more than about 10 buffers are unnecessary, and there is a noticeable
53 * performance hit in having more active on the card. So the majority of the
54 * card's memory isn't, in fact, used. Sadly, the card only has one transmit
55 * buffer and, short of loading our own firmware into it (which is what some
56 * drivers resort to) there's nothing we can do about this.
57 *
58 * We keep up to 4 "receive packet" commands active on the board at a time.
59 * When a packet comes in, so long as there is a receive command active, the
60 * board will send us a "packet received" PCB and then add the data for that
61 * packet to the DMA queue. If a DMA transfer is not already in progress, we
62 * set one up to start uploading the data. We have to maintain a list of
63 * backlogged receive packets, because the card may decide to tell us about
64 * a newly-arrived packet at any time, and we may not be able to start a DMA
65 * transfer immediately (ie one may already be going on). We can't NAK the
66 * PCB, because then it would throw the packet away.
67 *
68 * Trying to send a PCB to the card at the wrong moment seems to have bad
69 * effects. If we send it a transmit PCB while a receive DMA is happening,
70 * it will just NAK the PCB and so we will have wasted our time. Worse, it
71 * sometimes seems to interrupt the transfer. The majority of the low-level
72 * code is protected by one huge semaphore -- "busy" -- which is set whenever
73 * it probably isn't safe to do anything to the card. The receive routine
74 * must gain a lock on "busy" before it can start a DMA transfer, and the
75 * transmit routine must gain a lock before it sends the first PCB to the card.
76 * The send_pcb() routine also has an internal semaphore to protect it against
77 * being re-entered (which would be disastrous) -- this is needed because
78 * several things can happen asynchronously (re-priming the receiver and
79 * asking the card for statistics, for example). send_pcb() will also refuse
80 * to talk to the card at all if a DMA upload is happening. The higher-level
81 * networking code will reschedule a later retry if some part of the driver
82 * is blocked. In practice, this doesn't seem to happen very often.
83 */
84
85/* This driver may now work with revision 2.x hardware, since all the read
86 * operations on the HCR have been removed (we now keep our own softcopy).
87 * But I don't have an old card to test it on.
88 *
89 * This has had the bad effect that the autoprobe routine is now a bit
90 * less friendly to other devices. However, it was never very good.
91 * before, so I doubt it will hurt anybody.
92 */
93
94/* The driver is a mess. I took Craig's and Juha's code, and hacked it firstly
95 * to make it more reliable, and secondly to add DMA mode. Many things could
96 * probably be done better; the concurrency protection is particularly awful.
97 */
98
99#include <linux/module.h>
100#include <linux/kernel.h>
101#include <linux/string.h>
102#include <linux/interrupt.h>
103#include <linux/errno.h>
104#include <linux/in.h>
105#include <linux/slab.h>
106#include <linux/ioport.h>
107#include <linux/spinlock.h>
108#include <linux/ethtool.h>
109#include <linux/delay.h>
110#include <linux/bitops.h>
111
112#include <asm/uaccess.h>
113#include <asm/io.h>
114#include <asm/dma.h>
115
116#include <linux/netdevice.h>
117#include <linux/etherdevice.h>
118#include <linux/skbuff.h>
119#include <linux/init.h>
120
121#include "3c505.h"
122
123/*********************************************************
124 *
125 * define debug messages here as common strings to reduce space
126 *
127 *********************************************************/
128
129static const char filename[] = __FILE__;
130
131static const char timeout_msg[] = "*** timeout at %s:%s (line %d) ***\n";
132#define TIMEOUT_MSG(lineno) \
Harvey Harrisonb39d66a2008-08-20 16:52:04 -0700133 printk(timeout_msg, filename,__func__,(lineno))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134
135static const char invalid_pcb_msg[] =
136"*** invalid pcb length %d at %s:%s (line %d) ***\n";
137#define INVALID_PCB_MSG(len) \
Harvey Harrisonb39d66a2008-08-20 16:52:04 -0700138 printk(invalid_pcb_msg, (len),filename,__func__,__LINE__)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139
140static char search_msg[] __initdata = KERN_INFO "%s: Looking for 3c505 adapter at address %#x...";
141
142static char stilllooking_msg[] __initdata = "still looking...";
143
144static char found_msg[] __initdata = "found.\n";
145
146static char notfound_msg[] __initdata = "not found (reason = %d)\n";
147
148static char couldnot_msg[] __initdata = KERN_INFO "%s: 3c505 not found\n";
149
150/*********************************************************
151 *
152 * various other debug stuff
153 *
154 *********************************************************/
155
156#ifdef ELP_DEBUG
157static int elp_debug = ELP_DEBUG;
158#else
159static int elp_debug;
160#endif
161#define debug elp_debug
162
163/*
164 * 0 = no messages (well, some)
165 * 1 = messages when high level commands performed
166 * 2 = messages when low level commands performed
167 * 3 = messages when interrupts received
168 */
169
170/*****************************************************************
171 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700172 * List of I/O-addresses we try to auto-sense
173 * Last element MUST BE 0!
174 *****************************************************************/
175
176static int addr_list[] __initdata = {0x300, 0x280, 0x310, 0};
177
178/* Dma Memory related stuff */
179
180static unsigned long dma_mem_alloc(int size)
181{
182 int order = get_order(size);
183 return __get_dma_pages(GFP_KERNEL, order);
184}
185
186
187/*****************************************************************
188 *
189 * Functions for I/O (note the inline !)
190 *
191 *****************************************************************/
192
193static inline unsigned char inb_status(unsigned int base_addr)
194{
195 return inb(base_addr + PORT_STATUS);
196}
197
198static inline int inb_command(unsigned int base_addr)
199{
200 return inb(base_addr + PORT_COMMAND);
201}
202
203static inline void outb_control(unsigned char val, struct net_device *dev)
204{
205 outb(val, dev->base_addr + PORT_CONTROL);
206 ((elp_device *)(dev->priv))->hcr_val = val;
207}
208
209#define HCR_VAL(x) (((elp_device *)((x)->priv))->hcr_val)
210
211static inline void outb_command(unsigned char val, unsigned int base_addr)
212{
213 outb(val, base_addr + PORT_COMMAND);
214}
215
216static inline unsigned int backlog_next(unsigned int n)
217{
218 return (n + 1) % BACKLOG_SIZE;
219}
220
221/*****************************************************************
222 *
223 * useful functions for accessing the adapter
224 *
225 *****************************************************************/
226
227/*
228 * use this routine when accessing the ASF bits as they are
229 * changed asynchronously by the adapter
230 */
231
232/* get adapter PCB status */
233#define GET_ASF(addr) \
234 (get_status(addr)&ASF_PCB_MASK)
235
236static inline int get_status(unsigned int base_addr)
237{
238 unsigned long timeout = jiffies + 10*HZ/100;
239 register int stat1;
240 do {
241 stat1 = inb_status(base_addr);
242 } while (stat1 != inb_status(base_addr) && time_before(jiffies, timeout));
243 if (time_after_eq(jiffies, timeout))
244 TIMEOUT_MSG(__LINE__);
245 return stat1;
246}
247
248static inline void set_hsf(struct net_device *dev, int hsf)
249{
250 elp_device *adapter = dev->priv;
251 unsigned long flags;
252
253 spin_lock_irqsave(&adapter->lock, flags);
254 outb_control((HCR_VAL(dev) & ~HSF_PCB_MASK) | hsf, dev);
255 spin_unlock_irqrestore(&adapter->lock, flags);
256}
257
Richard Knutssondf570f92007-08-14 01:49:40 +0200258static bool start_receive(struct net_device *, pcb_struct *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259
Jesper Juhl77933d72005-07-27 11:46:09 -0700260static inline void adapter_reset(struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700261{
262 unsigned long timeout;
263 elp_device *adapter = dev->priv;
264 unsigned char orig_hcr = adapter->hcr_val;
265
266 outb_control(0, dev);
267
268 if (inb_status(dev->base_addr) & ACRF) {
269 do {
270 inb_command(dev->base_addr);
271 timeout = jiffies + 2*HZ/100;
272 while (time_before_eq(jiffies, timeout) && !(inb_status(dev->base_addr) & ACRF));
273 } while (inb_status(dev->base_addr) & ACRF);
274 set_hsf(dev, HSF_PCB_NAK);
275 }
276 outb_control(adapter->hcr_val | ATTN | DIR, dev);
277 mdelay(10);
278 outb_control(adapter->hcr_val & ~ATTN, dev);
279 mdelay(10);
280 outb_control(adapter->hcr_val | FLSH, dev);
281 mdelay(10);
282 outb_control(adapter->hcr_val & ~FLSH, dev);
283 mdelay(10);
284
285 outb_control(orig_hcr, dev);
286 if (!start_receive(dev, &adapter->tx_pcb))
287 printk(KERN_ERR "%s: start receive command failed \n", dev->name);
288}
289
290/* Check to make sure that a DMA transfer hasn't timed out. This should
291 * never happen in theory, but seems to occur occasionally if the card gets
292 * prodded at the wrong time.
293 */
294static inline void check_3c505_dma(struct net_device *dev)
295{
296 elp_device *adapter = dev->priv;
297 if (adapter->dmaing && time_after(jiffies, adapter->current_dma.start_time + 10)) {
298 unsigned long flags, f;
299 printk(KERN_ERR "%s: DMA %s timed out, %d bytes left\n", dev->name, adapter->current_dma.direction ? "download" : "upload", get_dma_residue(dev->dma));
300 spin_lock_irqsave(&adapter->lock, flags);
301 adapter->dmaing = 0;
302 adapter->busy = 0;
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400303
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304 f=claim_dma_lock();
305 disable_dma(dev->dma);
306 release_dma_lock(f);
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400307
Linus Torvalds1da177e2005-04-16 15:20:36 -0700308 if (adapter->rx_active)
309 adapter->rx_active--;
310 outb_control(adapter->hcr_val & ~(DMAE | TCEN | DIR), dev);
311 spin_unlock_irqrestore(&adapter->lock, flags);
312 }
313}
314
315/* Primitive functions used by send_pcb() */
Richard Knutssondf570f92007-08-14 01:49:40 +0200316static inline bool send_pcb_slow(unsigned int base_addr, unsigned char byte)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700317{
318 unsigned long timeout;
319 outb_command(byte, base_addr);
320 for (timeout = jiffies + 5*HZ/100; time_before(jiffies, timeout);) {
321 if (inb_status(base_addr) & HCRE)
Richard Knutssondf570f92007-08-14 01:49:40 +0200322 return false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700323 }
324 printk(KERN_WARNING "3c505: send_pcb_slow timed out\n");
Richard Knutssondf570f92007-08-14 01:49:40 +0200325 return true;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700326}
327
Richard Knutssondf570f92007-08-14 01:49:40 +0200328static inline bool send_pcb_fast(unsigned int base_addr, unsigned char byte)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700329{
330 unsigned int timeout;
331 outb_command(byte, base_addr);
332 for (timeout = 0; timeout < 40000; timeout++) {
333 if (inb_status(base_addr) & HCRE)
Richard Knutssondf570f92007-08-14 01:49:40 +0200334 return false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700335 }
336 printk(KERN_WARNING "3c505: send_pcb_fast timed out\n");
Richard Knutssondf570f92007-08-14 01:49:40 +0200337 return true;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338}
339
340/* Check to see if the receiver needs restarting, and kick it if so */
341static inline void prime_rx(struct net_device *dev)
342{
343 elp_device *adapter = dev->priv;
344 while (adapter->rx_active < ELP_RX_PCBS && netif_running(dev)) {
345 if (!start_receive(dev, &adapter->itx_pcb))
346 break;
347 }
348}
349
350/*****************************************************************
351 *
352 * send_pcb
353 * Send a PCB to the adapter.
354 *
355 * output byte to command reg --<--+
356 * wait until HCRE is non zero |
357 * loop until all bytes sent -->--+
358 * set HSF1 and HSF2 to 1
359 * output pcb length
360 * wait until ASF give ACK or NAK
361 * set HSF1 and HSF2 to 0
362 *
363 *****************************************************************/
364
365/* This can be quite slow -- the adapter is allowed to take up to 40ms
366 * to respond to the initial interrupt.
367 *
368 * We run initially with interrupts turned on, but with a semaphore set
369 * so that nobody tries to re-enter this code. Once the first byte has
370 * gone through, we turn interrupts off and then send the others (the
371 * timeout is reduced to 500us).
372 */
373
Richard Knutssondf570f92007-08-14 01:49:40 +0200374static bool send_pcb(struct net_device *dev, pcb_struct * pcb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700375{
376 int i;
377 unsigned long timeout;
378 elp_device *adapter = dev->priv;
379 unsigned long flags;
380
381 check_3c505_dma(dev);
382
383 if (adapter->dmaing && adapter->current_dma.direction == 0)
Richard Knutssondf570f92007-08-14 01:49:40 +0200384 return false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700385
386 /* Avoid contention */
387 if (test_and_set_bit(1, &adapter->send_pcb_semaphore)) {
388 if (elp_debug >= 3) {
389 printk(KERN_DEBUG "%s: send_pcb entered while threaded\n", dev->name);
390 }
Richard Knutssondf570f92007-08-14 01:49:40 +0200391 return false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700392 }
393 /*
394 * load each byte into the command register and
395 * wait for the HCRE bit to indicate the adapter
396 * had read the byte
397 */
398 set_hsf(dev, 0);
399
400 if (send_pcb_slow(dev->base_addr, pcb->command))
401 goto abort;
402
403 spin_lock_irqsave(&adapter->lock, flags);
404
405 if (send_pcb_fast(dev->base_addr, pcb->length))
406 goto sti_abort;
407
408 for (i = 0; i < pcb->length; i++) {
409 if (send_pcb_fast(dev->base_addr, pcb->data.raw[i]))
410 goto sti_abort;
411 }
412
413 outb_control(adapter->hcr_val | 3, dev); /* signal end of PCB */
414 outb_command(2 + pcb->length, dev->base_addr);
415
416 /* now wait for the acknowledgement */
417 spin_unlock_irqrestore(&adapter->lock, flags);
418
419 for (timeout = jiffies + 5*HZ/100; time_before(jiffies, timeout);) {
420 switch (GET_ASF(dev->base_addr)) {
421 case ASF_PCB_ACK:
422 adapter->send_pcb_semaphore = 0;
Richard Knutssondf570f92007-08-14 01:49:40 +0200423 return true;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424
425 case ASF_PCB_NAK:
426#ifdef ELP_DEBUG
427 printk(KERN_DEBUG "%s: send_pcb got NAK\n", dev->name);
428#endif
429 goto abort;
430 }
431 }
432
433 if (elp_debug >= 1)
434 printk(KERN_DEBUG "%s: timeout waiting for PCB acknowledge (status %02x)\n", dev->name, inb_status(dev->base_addr));
435 goto abort;
436
437 sti_abort:
438 spin_unlock_irqrestore(&adapter->lock, flags);
439 abort:
440 adapter->send_pcb_semaphore = 0;
Richard Knutssondf570f92007-08-14 01:49:40 +0200441 return false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700442}
443
444
445/*****************************************************************
446 *
447 * receive_pcb
448 * Read a PCB from the adapter
449 *
450 * wait for ACRF to be non-zero ---<---+
451 * input a byte |
452 * if ASF1 and ASF2 were not both one |
453 * before byte was read, loop --->---+
454 * set HSF1 and HSF2 for ack
455 *
456 *****************************************************************/
457
Richard Knutssondf570f92007-08-14 01:49:40 +0200458static bool receive_pcb(struct net_device *dev, pcb_struct * pcb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700459{
460 int i, j;
461 int total_length;
462 int stat;
463 unsigned long timeout;
464 unsigned long flags;
465
466 elp_device *adapter = dev->priv;
467
468 set_hsf(dev, 0);
469
470 /* get the command code */
471 timeout = jiffies + 2*HZ/100;
472 while (((stat = get_status(dev->base_addr)) & ACRF) == 0 && time_before(jiffies, timeout));
473 if (time_after_eq(jiffies, timeout)) {
474 TIMEOUT_MSG(__LINE__);
Richard Knutssondf570f92007-08-14 01:49:40 +0200475 return false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700476 }
477 pcb->command = inb_command(dev->base_addr);
478
479 /* read the data length */
480 timeout = jiffies + 3*HZ/100;
481 while (((stat = get_status(dev->base_addr)) & ACRF) == 0 && time_before(jiffies, timeout));
482 if (time_after_eq(jiffies, timeout)) {
483 TIMEOUT_MSG(__LINE__);
484 printk(KERN_INFO "%s: status %02x\n", dev->name, stat);
Richard Knutssondf570f92007-08-14 01:49:40 +0200485 return false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700486 }
487 pcb->length = inb_command(dev->base_addr);
488
489 if (pcb->length > MAX_PCB_DATA) {
490 INVALID_PCB_MSG(pcb->length);
491 adapter_reset(dev);
Richard Knutssondf570f92007-08-14 01:49:40 +0200492 return false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700493 }
494 /* read the data */
495 spin_lock_irqsave(&adapter->lock, flags);
496 i = 0;
497 do {
498 j = 0;
499 while (((stat = get_status(dev->base_addr)) & ACRF) == 0 && j++ < 20000);
500 pcb->data.raw[i++] = inb_command(dev->base_addr);
501 if (i > MAX_PCB_DATA)
502 INVALID_PCB_MSG(i);
503 } while ((stat & ASF_PCB_MASK) != ASF_PCB_END && j < 20000);
504 spin_unlock_irqrestore(&adapter->lock, flags);
505 if (j >= 20000) {
506 TIMEOUT_MSG(__LINE__);
Richard Knutssondf570f92007-08-14 01:49:40 +0200507 return false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700508 }
509 /* woops, the last "data" byte was really the length! */
510 total_length = pcb->data.raw[--i];
511
512 /* safety check total length vs data length */
513 if (total_length != (pcb->length + 2)) {
514 if (elp_debug >= 2)
515 printk(KERN_WARNING "%s: mangled PCB received\n", dev->name);
516 set_hsf(dev, HSF_PCB_NAK);
Richard Knutssondf570f92007-08-14 01:49:40 +0200517 return false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700518 }
519
520 if (pcb->command == CMD_RECEIVE_PACKET_COMPLETE) {
521 if (test_and_set_bit(0, (void *) &adapter->busy)) {
522 if (backlog_next(adapter->rx_backlog.in) == adapter->rx_backlog.out) {
523 set_hsf(dev, HSF_PCB_NAK);
524 printk(KERN_WARNING "%s: PCB rejected, transfer in progress and backlog full\n", dev->name);
525 pcb->command = 0;
Richard Knutssondf570f92007-08-14 01:49:40 +0200526 return true;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700527 } else {
528 pcb->command = 0xff;
529 }
530 }
531 }
532 set_hsf(dev, HSF_PCB_ACK);
Richard Knutssondf570f92007-08-14 01:49:40 +0200533 return true;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700534}
535
536/******************************************************
537 *
538 * queue a receive command on the adapter so we will get an
539 * interrupt when a packet is received.
540 *
541 ******************************************************/
542
Richard Knutssondf570f92007-08-14 01:49:40 +0200543static bool start_receive(struct net_device *dev, pcb_struct * tx_pcb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700544{
Richard Knutssondf570f92007-08-14 01:49:40 +0200545 bool status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700546 elp_device *adapter = dev->priv;
547
548 if (elp_debug >= 3)
549 printk(KERN_DEBUG "%s: restarting receiver\n", dev->name);
550 tx_pcb->command = CMD_RECEIVE_PACKET;
551 tx_pcb->length = sizeof(struct Rcv_pkt);
552 tx_pcb->data.rcv_pkt.buf_seg
553 = tx_pcb->data.rcv_pkt.buf_ofs = 0; /* Unused */
554 tx_pcb->data.rcv_pkt.buf_len = 1600;
555 tx_pcb->data.rcv_pkt.timeout = 0; /* set timeout to zero */
556 status = send_pcb(dev, tx_pcb);
557 if (status)
558 adapter->rx_active++;
559 return status;
560}
561
562/******************************************************
563 *
564 * extract a packet from the adapter
565 * this routine is only called from within the interrupt
566 * service routine, so no cli/sti calls are needed
567 * note that the length is always assumed to be even
568 *
569 ******************************************************/
570
571static void receive_packet(struct net_device *dev, int len)
572{
573 int rlen;
574 elp_device *adapter = dev->priv;
575 void *target;
576 struct sk_buff *skb;
577 unsigned long flags;
578
579 rlen = (len + 1) & ~1;
580 skb = dev_alloc_skb(rlen + 2);
581
582 if (!skb) {
583 printk(KERN_WARNING "%s: memory squeeze, dropping packet\n", dev->name);
584 target = adapter->dma_buffer;
585 adapter->current_dma.target = NULL;
586 /* FIXME: stats */
587 return;
588 }
589
590 skb_reserve(skb, 2);
591 target = skb_put(skb, rlen);
592 if ((unsigned long)(target + rlen) >= MAX_DMA_ADDRESS) {
593 adapter->current_dma.target = target;
594 target = adapter->dma_buffer;
595 } else {
596 adapter->current_dma.target = NULL;
597 }
598
599 /* if this happens, we die */
600 if (test_and_set_bit(0, (void *) &adapter->dmaing))
601 printk(KERN_ERR "%s: rx blocked, DMA in progress, dir %d\n", dev->name, adapter->current_dma.direction);
602
Linus Torvalds1da177e2005-04-16 15:20:36 -0700603 adapter->current_dma.direction = 0;
604 adapter->current_dma.length = rlen;
605 adapter->current_dma.skb = skb;
606 adapter->current_dma.start_time = jiffies;
607
608 outb_control(adapter->hcr_val | DIR | TCEN | DMAE, dev);
609
610 flags=claim_dma_lock();
611 disable_dma(dev->dma);
612 clear_dma_ff(dev->dma);
613 set_dma_mode(dev->dma, 0x04); /* dma read */
614 set_dma_addr(dev->dma, isa_virt_to_bus(target));
615 set_dma_count(dev->dma, rlen);
616 enable_dma(dev->dma);
617 release_dma_lock(flags);
618
619 if (elp_debug >= 3) {
620 printk(KERN_DEBUG "%s: rx DMA transfer started\n", dev->name);
621 }
622
623 if (adapter->rx_active)
624 adapter->rx_active--;
625
626 if (!adapter->busy)
627 printk(KERN_WARNING "%s: receive_packet called, busy not set.\n", dev->name);
628}
629
630/******************************************************
631 *
632 * interrupt handler
633 *
634 ******************************************************/
635
David Howells7d12e782006-10-05 14:55:46 +0100636static irqreturn_t elp_interrupt(int irq, void *dev_id)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700637{
638 int len;
639 int dlen;
640 int icount = 0;
641 struct net_device *dev;
642 elp_device *adapter;
643 unsigned long timeout;
644
645 dev = dev_id;
646 adapter = (elp_device *) dev->priv;
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400647
Linus Torvalds1da177e2005-04-16 15:20:36 -0700648 spin_lock(&adapter->lock);
649
650 do {
651 /*
652 * has a DMA transfer finished?
653 */
654 if (inb_status(dev->base_addr) & DONE) {
655 if (!adapter->dmaing) {
656 printk(KERN_WARNING "%s: phantom DMA completed\n", dev->name);
657 }
658 if (elp_debug >= 3) {
659 printk(KERN_DEBUG "%s: %s DMA complete, status %02x\n", dev->name, adapter->current_dma.direction ? "tx" : "rx", inb_status(dev->base_addr));
660 }
661
662 outb_control(adapter->hcr_val & ~(DMAE | TCEN | DIR), dev);
663 if (adapter->current_dma.direction) {
664 dev_kfree_skb_irq(adapter->current_dma.skb);
665 } else {
666 struct sk_buff *skb = adapter->current_dma.skb;
667 if (skb) {
668 if (adapter->current_dma.target) {
669 /* have already done the skb_put() */
670 memcpy(adapter->current_dma.target, adapter->dma_buffer, adapter->current_dma.length);
671 }
672 skb->protocol = eth_type_trans(skb,dev);
Paulius Zaleckasba0f6ca2008-04-29 02:27:37 +0300673 dev->stats.rx_bytes += skb->len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700674 netif_rx(skb);
675 dev->last_rx = jiffies;
676 }
677 }
678 adapter->dmaing = 0;
679 if (adapter->rx_backlog.in != adapter->rx_backlog.out) {
680 int t = adapter->rx_backlog.length[adapter->rx_backlog.out];
681 adapter->rx_backlog.out = backlog_next(adapter->rx_backlog.out);
682 if (elp_debug >= 2)
683 printk(KERN_DEBUG "%s: receiving backlogged packet (%d)\n", dev->name, t);
684 receive_packet(dev, t);
685 } else {
686 adapter->busy = 0;
687 }
688 } else {
689 /* has one timed out? */
690 check_3c505_dma(dev);
691 }
692
693 /*
694 * receive a PCB from the adapter
695 */
696 timeout = jiffies + 3*HZ/100;
697 while ((inb_status(dev->base_addr) & ACRF) != 0 && time_before(jiffies, timeout)) {
698 if (receive_pcb(dev, &adapter->irx_pcb)) {
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400699 switch (adapter->irx_pcb.command)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700700 {
701 case 0:
702 break;
703 /*
704 * received a packet - this must be handled fast
705 */
706 case 0xff:
707 case CMD_RECEIVE_PACKET_COMPLETE:
708 /* if the device isn't open, don't pass packets up the stack */
709 if (!netif_running(dev))
710 break;
711 len = adapter->irx_pcb.data.rcv_resp.pkt_len;
712 dlen = adapter->irx_pcb.data.rcv_resp.buf_len;
713 if (adapter->irx_pcb.data.rcv_resp.timeout != 0) {
714 printk(KERN_ERR "%s: interrupt - packet not received correctly\n", dev->name);
715 } else {
716 if (elp_debug >= 3) {
717 printk(KERN_DEBUG "%s: interrupt - packet received of length %i (%i)\n", dev->name, len, dlen);
718 }
719 if (adapter->irx_pcb.command == 0xff) {
720 if (elp_debug >= 2)
721 printk(KERN_DEBUG "%s: adding packet to backlog (len = %d)\n", dev->name, dlen);
722 adapter->rx_backlog.length[adapter->rx_backlog.in] = dlen;
723 adapter->rx_backlog.in = backlog_next(adapter->rx_backlog.in);
724 } else {
725 receive_packet(dev, dlen);
726 }
727 if (elp_debug >= 3)
728 printk(KERN_DEBUG "%s: packet received\n", dev->name);
729 }
730 break;
731
732 /*
733 * 82586 configured correctly
734 */
735 case CMD_CONFIGURE_82586_RESPONSE:
736 adapter->got[CMD_CONFIGURE_82586] = 1;
737 if (elp_debug >= 3)
738 printk(KERN_DEBUG "%s: interrupt - configure response received\n", dev->name);
739 break;
740
741 /*
742 * Adapter memory configuration
743 */
744 case CMD_CONFIGURE_ADAPTER_RESPONSE:
745 adapter->got[CMD_CONFIGURE_ADAPTER_MEMORY] = 1;
746 if (elp_debug >= 3)
747 printk(KERN_DEBUG "%s: Adapter memory configuration %s.\n", dev->name,
748 adapter->irx_pcb.data.failed ? "failed" : "succeeded");
749 break;
750
751 /*
752 * Multicast list loading
753 */
754 case CMD_LOAD_MULTICAST_RESPONSE:
755 adapter->got[CMD_LOAD_MULTICAST_LIST] = 1;
756 if (elp_debug >= 3)
757 printk(KERN_DEBUG "%s: Multicast address list loading %s.\n", dev->name,
758 adapter->irx_pcb.data.failed ? "failed" : "succeeded");
759 break;
760
761 /*
762 * Station address setting
763 */
764 case CMD_SET_ADDRESS_RESPONSE:
765 adapter->got[CMD_SET_STATION_ADDRESS] = 1;
766 if (elp_debug >= 3)
767 printk(KERN_DEBUG "%s: Ethernet address setting %s.\n", dev->name,
768 adapter->irx_pcb.data.failed ? "failed" : "succeeded");
769 break;
770
771
772 /*
773 * received board statistics
774 */
775 case CMD_NETWORK_STATISTICS_RESPONSE:
Paulius Zaleckasba0f6ca2008-04-29 02:27:37 +0300776 dev->stats.rx_packets += adapter->irx_pcb.data.netstat.tot_recv;
777 dev->stats.tx_packets += adapter->irx_pcb.data.netstat.tot_xmit;
778 dev->stats.rx_crc_errors += adapter->irx_pcb.data.netstat.err_CRC;
779 dev->stats.rx_frame_errors += adapter->irx_pcb.data.netstat.err_align;
780 dev->stats.rx_fifo_errors += adapter->irx_pcb.data.netstat.err_ovrrun;
781 dev->stats.rx_over_errors += adapter->irx_pcb.data.netstat.err_res;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700782 adapter->got[CMD_NETWORK_STATISTICS] = 1;
783 if (elp_debug >= 3)
784 printk(KERN_DEBUG "%s: interrupt - statistics response received\n", dev->name);
785 break;
786
787 /*
788 * sent a packet
789 */
790 case CMD_TRANSMIT_PACKET_COMPLETE:
791 if (elp_debug >= 3)
792 printk(KERN_DEBUG "%s: interrupt - packet sent\n", dev->name);
793 if (!netif_running(dev))
794 break;
795 switch (adapter->irx_pcb.data.xmit_resp.c_stat) {
796 case 0xffff:
Paulius Zaleckasba0f6ca2008-04-29 02:27:37 +0300797 dev->stats.tx_aborted_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700798 printk(KERN_INFO "%s: transmit timed out, network cable problem?\n", dev->name);
799 break;
800 case 0xfffe:
Paulius Zaleckasba0f6ca2008-04-29 02:27:37 +0300801 dev->stats.tx_fifo_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700802 printk(KERN_INFO "%s: transmit timed out, FIFO underrun\n", dev->name);
803 break;
804 }
805 netif_wake_queue(dev);
806 break;
807
808 /*
809 * some unknown PCB
810 */
811 default:
812 printk(KERN_DEBUG "%s: unknown PCB received - %2.2x\n", dev->name, adapter->irx_pcb.command);
813 break;
814 }
815 } else {
816 printk(KERN_WARNING "%s: failed to read PCB on interrupt\n", dev->name);
817 adapter_reset(dev);
818 }
819 }
820
821 } while (icount++ < 5 && (inb_status(dev->base_addr) & (ACRF | DONE)));
822
823 prime_rx(dev);
824
825 /*
826 * indicate no longer in interrupt routine
827 */
828 spin_unlock(&adapter->lock);
829 return IRQ_HANDLED;
830}
831
832
833/******************************************************
834 *
835 * open the board
836 *
837 ******************************************************/
838
839static int elp_open(struct net_device *dev)
840{
841 elp_device *adapter;
842 int retval;
843
844 adapter = dev->priv;
845
846 if (elp_debug >= 3)
847 printk(KERN_DEBUG "%s: request to open device\n", dev->name);
848
849 /*
850 * make sure we actually found the device
851 */
852 if (adapter == NULL) {
853 printk(KERN_ERR "%s: Opening a non-existent physical device\n", dev->name);
854 return -EAGAIN;
855 }
856 /*
857 * disable interrupts on the board
858 */
859 outb_control(0, dev);
860
861 /*
862 * clear any pending interrupts
863 */
864 inb_command(dev->base_addr);
865 adapter_reset(dev);
866
867 /*
868 * no receive PCBs active
869 */
870 adapter->rx_active = 0;
871
872 adapter->busy = 0;
873 adapter->send_pcb_semaphore = 0;
874 adapter->rx_backlog.in = 0;
875 adapter->rx_backlog.out = 0;
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400876
Linus Torvalds1da177e2005-04-16 15:20:36 -0700877 spin_lock_init(&adapter->lock);
878
879 /*
880 * install our interrupt service routine
881 */
882 if ((retval = request_irq(dev->irq, &elp_interrupt, 0, dev->name, dev))) {
883 printk(KERN_ERR "%s: could not allocate IRQ%d\n", dev->name, dev->irq);
884 return retval;
885 }
886 if ((retval = request_dma(dev->dma, dev->name))) {
887 free_irq(dev->irq, dev);
888 printk(KERN_ERR "%s: could not allocate DMA%d channel\n", dev->name, dev->dma);
889 return retval;
890 }
891 adapter->dma_buffer = (void *) dma_mem_alloc(DMA_BUFFER_SIZE);
892 if (!adapter->dma_buffer) {
893 printk(KERN_ERR "%s: could not allocate DMA buffer\n", dev->name);
894 free_dma(dev->dma);
895 free_irq(dev->irq, dev);
896 return -ENOMEM;
897 }
898 adapter->dmaing = 0;
899
900 /*
901 * enable interrupts on the board
902 */
903 outb_control(CMDE, dev);
904
905 /*
906 * configure adapter memory: we need 10 multicast addresses, default==0
907 */
908 if (elp_debug >= 3)
909 printk(KERN_DEBUG "%s: sending 3c505 memory configuration command\n", dev->name);
910 adapter->tx_pcb.command = CMD_CONFIGURE_ADAPTER_MEMORY;
911 adapter->tx_pcb.data.memconf.cmd_q = 10;
912 adapter->tx_pcb.data.memconf.rcv_q = 20;
913 adapter->tx_pcb.data.memconf.mcast = 10;
914 adapter->tx_pcb.data.memconf.frame = 20;
915 adapter->tx_pcb.data.memconf.rcv_b = 20;
916 adapter->tx_pcb.data.memconf.progs = 0;
917 adapter->tx_pcb.length = sizeof(struct Memconf);
918 adapter->got[CMD_CONFIGURE_ADAPTER_MEMORY] = 0;
919 if (!send_pcb(dev, &adapter->tx_pcb))
920 printk(KERN_ERR "%s: couldn't send memory configuration command\n", dev->name);
921 else {
922 unsigned long timeout = jiffies + TIMEOUT;
923 while (adapter->got[CMD_CONFIGURE_ADAPTER_MEMORY] == 0 && time_before(jiffies, timeout));
924 if (time_after_eq(jiffies, timeout))
925 TIMEOUT_MSG(__LINE__);
926 }
927
928
929 /*
930 * configure adapter to receive broadcast messages and wait for response
931 */
932 if (elp_debug >= 3)
933 printk(KERN_DEBUG "%s: sending 82586 configure command\n", dev->name);
934 adapter->tx_pcb.command = CMD_CONFIGURE_82586;
935 adapter->tx_pcb.data.configure = NO_LOOPBACK | RECV_BROAD;
936 adapter->tx_pcb.length = 2;
937 adapter->got[CMD_CONFIGURE_82586] = 0;
938 if (!send_pcb(dev, &adapter->tx_pcb))
939 printk(KERN_ERR "%s: couldn't send 82586 configure command\n", dev->name);
940 else {
941 unsigned long timeout = jiffies + TIMEOUT;
942 while (adapter->got[CMD_CONFIGURE_82586] == 0 && time_before(jiffies, timeout));
943 if (time_after_eq(jiffies, timeout))
944 TIMEOUT_MSG(__LINE__);
945 }
946
947 /* enable burst-mode DMA */
948 /* outb(0x1, dev->base_addr + PORT_AUXDMA); */
949
950 /*
951 * queue receive commands to provide buffering
952 */
953 prime_rx(dev);
954 if (elp_debug >= 3)
955 printk(KERN_DEBUG "%s: %d receive PCBs active\n", dev->name, adapter->rx_active);
956
957 /*
958 * device is now officially open!
959 */
960
961 netif_start_queue(dev);
962 return 0;
963}
964
965
966/******************************************************
967 *
968 * send a packet to the adapter
969 *
970 ******************************************************/
971
Richard Knutssondf570f92007-08-14 01:49:40 +0200972static bool send_packet(struct net_device *dev, struct sk_buff *skb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700973{
974 elp_device *adapter = dev->priv;
975 unsigned long target;
976 unsigned long flags;
977
978 /*
979 * make sure the length is even and no shorter than 60 bytes
980 */
981 unsigned int nlen = (((skb->len < 60) ? 60 : skb->len) + 1) & (~1);
982
983 if (test_and_set_bit(0, (void *) &adapter->busy)) {
984 if (elp_debug >= 2)
985 printk(KERN_DEBUG "%s: transmit blocked\n", dev->name);
Richard Knutssondf570f92007-08-14 01:49:40 +0200986 return false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700987 }
988
Paulius Zaleckasba0f6ca2008-04-29 02:27:37 +0300989 dev->stats.tx_bytes += nlen;
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400990
Linus Torvalds1da177e2005-04-16 15:20:36 -0700991 /*
992 * send the adapter a transmit packet command. Ignore segment and offset
993 * and make sure the length is even
994 */
995 adapter->tx_pcb.command = CMD_TRANSMIT_PACKET;
996 adapter->tx_pcb.length = sizeof(struct Xmit_pkt);
997 adapter->tx_pcb.data.xmit_pkt.buf_ofs
998 = adapter->tx_pcb.data.xmit_pkt.buf_seg = 0; /* Unused */
999 adapter->tx_pcb.data.xmit_pkt.pkt_len = nlen;
1000
1001 if (!send_pcb(dev, &adapter->tx_pcb)) {
1002 adapter->busy = 0;
Richard Knutssondf570f92007-08-14 01:49:40 +02001003 return false;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001004 }
1005 /* if this happens, we die */
1006 if (test_and_set_bit(0, (void *) &adapter->dmaing))
1007 printk(KERN_DEBUG "%s: tx: DMA %d in progress\n", dev->name, adapter->current_dma.direction);
1008
1009 adapter->current_dma.direction = 1;
1010 adapter->current_dma.start_time = jiffies;
1011
1012 if ((unsigned long)(skb->data + nlen) >= MAX_DMA_ADDRESS || nlen != skb->len) {
Arnaldo Carvalho de Melod626f622007-03-27 18:55:52 -03001013 skb_copy_from_linear_data(skb, adapter->dma_buffer, nlen);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001014 memset(adapter->dma_buffer+skb->len, 0, nlen-skb->len);
1015 target = isa_virt_to_bus(adapter->dma_buffer);
1016 }
1017 else {
1018 target = isa_virt_to_bus(skb->data);
1019 }
1020 adapter->current_dma.skb = skb;
1021
1022 flags=claim_dma_lock();
1023 disable_dma(dev->dma);
1024 clear_dma_ff(dev->dma);
1025 set_dma_mode(dev->dma, 0x48); /* dma memory -> io */
1026 set_dma_addr(dev->dma, target);
1027 set_dma_count(dev->dma, nlen);
1028 outb_control(adapter->hcr_val | DMAE | TCEN, dev);
1029 enable_dma(dev->dma);
1030 release_dma_lock(flags);
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001031
Linus Torvalds1da177e2005-04-16 15:20:36 -07001032 if (elp_debug >= 3)
1033 printk(KERN_DEBUG "%s: DMA transfer started\n", dev->name);
1034
Richard Knutssondf570f92007-08-14 01:49:40 +02001035 return true;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001036}
1037
1038/*
1039 * The upper layer thinks we timed out
1040 */
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001041
Linus Torvalds1da177e2005-04-16 15:20:36 -07001042static void elp_timeout(struct net_device *dev)
1043{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001044 int stat;
1045
1046 stat = inb_status(dev->base_addr);
1047 printk(KERN_WARNING "%s: transmit timed out, lost %s?\n", dev->name, (stat & ACRF) ? "interrupt" : "command");
1048 if (elp_debug >= 1)
1049 printk(KERN_DEBUG "%s: status %#02x\n", dev->name, stat);
1050 dev->trans_start = jiffies;
Paulius Zaleckasba0f6ca2008-04-29 02:27:37 +03001051 dev->stats.tx_dropped++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001052 netif_wake_queue(dev);
1053}
1054
1055/******************************************************
1056 *
1057 * start the transmitter
1058 * return 0 if sent OK, else return 1
1059 *
1060 ******************************************************/
1061
1062static int elp_start_xmit(struct sk_buff *skb, struct net_device *dev)
1063{
1064 unsigned long flags;
1065 elp_device *adapter = dev->priv;
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001066
Linus Torvalds1da177e2005-04-16 15:20:36 -07001067 spin_lock_irqsave(&adapter->lock, flags);
1068 check_3c505_dma(dev);
1069
1070 if (elp_debug >= 3)
1071 printk(KERN_DEBUG "%s: request to send packet of length %d\n", dev->name, (int) skb->len);
1072
1073 netif_stop_queue(dev);
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001074
Linus Torvalds1da177e2005-04-16 15:20:36 -07001075 /*
1076 * send the packet at skb->data for skb->len
1077 */
1078 if (!send_packet(dev, skb)) {
1079 if (elp_debug >= 2) {
1080 printk(KERN_DEBUG "%s: failed to transmit packet\n", dev->name);
1081 }
1082 spin_unlock_irqrestore(&adapter->lock, flags);
1083 return 1;
1084 }
1085 if (elp_debug >= 3)
1086 printk(KERN_DEBUG "%s: packet of length %d sent\n", dev->name, (int) skb->len);
1087
1088 /*
1089 * start the transmit timeout
1090 */
1091 dev->trans_start = jiffies;
1092
1093 prime_rx(dev);
1094 spin_unlock_irqrestore(&adapter->lock, flags);
1095 netif_start_queue(dev);
1096 return 0;
1097}
1098
1099/******************************************************
1100 *
1101 * return statistics on the board
1102 *
1103 ******************************************************/
1104
1105static struct net_device_stats *elp_get_stats(struct net_device *dev)
1106{
1107 elp_device *adapter = (elp_device *) dev->priv;
1108
1109 if (elp_debug >= 3)
1110 printk(KERN_DEBUG "%s: request for stats\n", dev->name);
1111
1112 /* If the device is closed, just return the latest stats we have,
1113 - we cannot ask from the adapter without interrupts */
1114 if (!netif_running(dev))
Paulius Zaleckasba0f6ca2008-04-29 02:27:37 +03001115 return &dev->stats;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001116
1117 /* send a get statistics command to the board */
1118 adapter->tx_pcb.command = CMD_NETWORK_STATISTICS;
1119 adapter->tx_pcb.length = 0;
1120 adapter->got[CMD_NETWORK_STATISTICS] = 0;
1121 if (!send_pcb(dev, &adapter->tx_pcb))
1122 printk(KERN_ERR "%s: couldn't send get statistics command\n", dev->name);
1123 else {
1124 unsigned long timeout = jiffies + TIMEOUT;
1125 while (adapter->got[CMD_NETWORK_STATISTICS] == 0 && time_before(jiffies, timeout));
1126 if (time_after_eq(jiffies, timeout)) {
1127 TIMEOUT_MSG(__LINE__);
Paulius Zaleckasba0f6ca2008-04-29 02:27:37 +03001128 return &dev->stats;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001129 }
1130 }
1131
1132 /* statistics are now up to date */
Paulius Zaleckasba0f6ca2008-04-29 02:27:37 +03001133 return &dev->stats;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001134}
1135
1136
1137static void netdev_get_drvinfo(struct net_device *dev,
1138 struct ethtool_drvinfo *info)
1139{
1140 strcpy(info->driver, DRV_NAME);
1141 strcpy(info->version, DRV_VERSION);
1142 sprintf(info->bus_info, "ISA 0x%lx", dev->base_addr);
1143}
1144
1145static u32 netdev_get_msglevel(struct net_device *dev)
1146{
1147 return debug;
1148}
1149
1150static void netdev_set_msglevel(struct net_device *dev, u32 level)
1151{
1152 debug = level;
1153}
1154
Jeff Garzik7282d492006-09-13 14:30:00 -04001155static const struct ethtool_ops netdev_ethtool_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001156 .get_drvinfo = netdev_get_drvinfo,
1157 .get_msglevel = netdev_get_msglevel,
1158 .set_msglevel = netdev_set_msglevel,
1159};
1160
1161/******************************************************
1162 *
1163 * close the board
1164 *
1165 ******************************************************/
1166
1167static int elp_close(struct net_device *dev)
1168{
1169 elp_device *adapter;
1170
1171 adapter = dev->priv;
1172
1173 if (elp_debug >= 3)
1174 printk(KERN_DEBUG "%s: request to close device\n", dev->name);
1175
1176 netif_stop_queue(dev);
1177
1178 /* Someone may request the device statistic information even when
1179 * the interface is closed. The following will update the statistics
1180 * structure in the driver, so we'll be able to give current statistics.
1181 */
1182 (void) elp_get_stats(dev);
1183
1184 /*
1185 * disable interrupts on the board
1186 */
1187 outb_control(0, dev);
1188
1189 /*
1190 * release the IRQ
1191 */
1192 free_irq(dev->irq, dev);
1193
1194 free_dma(dev->dma);
1195 free_pages((unsigned long) adapter->dma_buffer, get_order(DMA_BUFFER_SIZE));
1196
1197 return 0;
1198}
1199
1200
1201/************************************************************
1202 *
1203 * Set multicast list
1204 * num_addrs==0: clear mc_list
1205 * num_addrs==-1: set promiscuous mode
1206 * num_addrs>0: set mc_list
1207 *
1208 ************************************************************/
1209
1210static void elp_set_mc_list(struct net_device *dev)
1211{
1212 elp_device *adapter = (elp_device *) dev->priv;
1213 struct dev_mc_list *dmi = dev->mc_list;
1214 int i;
1215 unsigned long flags;
1216
1217 if (elp_debug >= 3)
1218 printk(KERN_DEBUG "%s: request to set multicast list\n", dev->name);
1219
1220 spin_lock_irqsave(&adapter->lock, flags);
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001221
Linus Torvalds1da177e2005-04-16 15:20:36 -07001222 if (!(dev->flags & (IFF_PROMISC | IFF_ALLMULTI))) {
1223 /* send a "load multicast list" command to the board, max 10 addrs/cmd */
1224 /* if num_addrs==0 the list will be cleared */
1225 adapter->tx_pcb.command = CMD_LOAD_MULTICAST_LIST;
1226 adapter->tx_pcb.length = 6 * dev->mc_count;
1227 for (i = 0; i < dev->mc_count; i++) {
1228 memcpy(adapter->tx_pcb.data.multicast[i], dmi->dmi_addr, 6);
1229 dmi = dmi->next;
1230 }
1231 adapter->got[CMD_LOAD_MULTICAST_LIST] = 0;
1232 if (!send_pcb(dev, &adapter->tx_pcb))
1233 printk(KERN_ERR "%s: couldn't send set_multicast command\n", dev->name);
1234 else {
1235 unsigned long timeout = jiffies + TIMEOUT;
1236 while (adapter->got[CMD_LOAD_MULTICAST_LIST] == 0 && time_before(jiffies, timeout));
1237 if (time_after_eq(jiffies, timeout)) {
1238 TIMEOUT_MSG(__LINE__);
1239 }
1240 }
1241 if (dev->mc_count)
1242 adapter->tx_pcb.data.configure = NO_LOOPBACK | RECV_BROAD | RECV_MULTI;
1243 else /* num_addrs == 0 */
1244 adapter->tx_pcb.data.configure = NO_LOOPBACK | RECV_BROAD;
1245 } else
1246 adapter->tx_pcb.data.configure = NO_LOOPBACK | RECV_PROMISC;
1247 /*
1248 * configure adapter to receive messages (as specified above)
1249 * and wait for response
1250 */
1251 if (elp_debug >= 3)
1252 printk(KERN_DEBUG "%s: sending 82586 configure command\n", dev->name);
1253 adapter->tx_pcb.command = CMD_CONFIGURE_82586;
1254 adapter->tx_pcb.length = 2;
1255 adapter->got[CMD_CONFIGURE_82586] = 0;
1256 if (!send_pcb(dev, &adapter->tx_pcb))
1257 {
1258 spin_unlock_irqrestore(&adapter->lock, flags);
1259 printk(KERN_ERR "%s: couldn't send 82586 configure command\n", dev->name);
1260 }
1261 else {
1262 unsigned long timeout = jiffies + TIMEOUT;
1263 spin_unlock_irqrestore(&adapter->lock, flags);
1264 while (adapter->got[CMD_CONFIGURE_82586] == 0 && time_before(jiffies, timeout));
1265 if (time_after_eq(jiffies, timeout))
1266 TIMEOUT_MSG(__LINE__);
1267 }
1268}
1269
1270/************************************************************
1271 *
1272 * A couple of tests to see if there's 3C505 or not
1273 * Called only by elp_autodetect
1274 ************************************************************/
1275
1276static int __init elp_sense(struct net_device *dev)
1277{
1278 int addr = dev->base_addr;
1279 const char *name = dev->name;
1280 byte orig_HSR;
1281
1282 if (!request_region(addr, ELP_IO_EXTENT, "3c505"))
1283 return -ENODEV;
1284
1285 orig_HSR = inb_status(addr);
1286
1287 if (elp_debug > 0)
1288 printk(search_msg, name, addr);
1289
1290 if (orig_HSR == 0xff) {
1291 if (elp_debug > 0)
1292 printk(notfound_msg, 1);
1293 goto out;
1294 }
1295
1296 /* Wait for a while; the adapter may still be booting up */
1297 if (elp_debug > 0)
1298 printk(stilllooking_msg);
1299
1300 if (orig_HSR & DIR) {
1301 /* If HCR.DIR is up, we pull it down. HSR.DIR should follow. */
1302 outb(0, dev->base_addr + PORT_CONTROL);
Domen Puncerc56943e2005-05-12 22:21:51 -04001303 msleep(300);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001304 if (inb_status(addr) & DIR) {
1305 if (elp_debug > 0)
1306 printk(notfound_msg, 2);
1307 goto out;
1308 }
1309 } else {
1310 /* If HCR.DIR is down, we pull it up. HSR.DIR should follow. */
1311 outb(DIR, dev->base_addr + PORT_CONTROL);
Domen Puncerc56943e2005-05-12 22:21:51 -04001312 msleep(300);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001313 if (!(inb_status(addr) & DIR)) {
1314 if (elp_debug > 0)
1315 printk(notfound_msg, 3);
1316 goto out;
1317 }
1318 }
1319 /*
1320 * It certainly looks like a 3c505.
1321 */
1322 if (elp_debug > 0)
1323 printk(found_msg);
1324
1325 return 0;
1326out:
1327 release_region(addr, ELP_IO_EXTENT);
1328 return -ENODEV;
1329}
1330
1331/*************************************************************
1332 *
1333 * Search through addr_list[] and try to find a 3C505
1334 * Called only by eplus_probe
1335 *************************************************************/
1336
1337static int __init elp_autodetect(struct net_device *dev)
1338{
1339 int idx = 0;
1340
1341 /* if base address set, then only check that address
1342 otherwise, run through the table */
1343 if (dev->base_addr != 0) { /* dev->base_addr == 0 ==> plain autodetect */
1344 if (elp_sense(dev) == 0)
1345 return dev->base_addr;
1346 } else
1347 while ((dev->base_addr = addr_list[idx++])) {
1348 if (elp_sense(dev) == 0)
1349 return dev->base_addr;
1350 }
1351
1352 /* could not find an adapter */
1353 if (elp_debug > 0)
1354 printk(couldnot_msg, dev->name);
1355
1356 return 0; /* Because of this, the layer above will return -ENODEV */
1357}
1358
1359
1360/******************************************************
1361 *
1362 * probe for an Etherlink Plus board at the specified address
1363 *
1364 ******************************************************/
1365
1366/* There are three situations we need to be able to detect here:
1367
1368 * a) the card is idle
1369 * b) the card is still booting up
1370 * c) the card is stuck in a strange state (some DOS drivers do this)
1371 *
1372 * In case (a), all is well. In case (b), we wait 10 seconds to see if the
1373 * card finishes booting, and carry on if so. In case (c), we do a hard reset,
1374 * loop round, and hope for the best.
1375 *
1376 * This is all very unpleasant, but hopefully avoids the problems with the old
1377 * probe code (which had a 15-second delay if the card was idle, and didn't
1378 * work at all if it was in a weird state).
1379 */
1380
1381static int __init elplus_setup(struct net_device *dev)
1382{
1383 elp_device *adapter = dev->priv;
1384 int i, tries, tries1, okay;
1385 unsigned long timeout;
1386 unsigned long cookie = 0;
1387 int err = -ENODEV;
Joe Perches0795af52007-10-03 17:59:30 -07001388 DECLARE_MAC_BUF(mac);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001389
Linus Torvalds1da177e2005-04-16 15:20:36 -07001390 /*
1391 * setup adapter structure
1392 */
1393
1394 dev->base_addr = elp_autodetect(dev);
1395 if (!dev->base_addr)
1396 return -ENODEV;
1397
1398 adapter->send_pcb_semaphore = 0;
1399
1400 for (tries1 = 0; tries1 < 3; tries1++) {
1401 outb_control((adapter->hcr_val | CMDE) & ~DIR, dev);
1402 /* First try to write just one byte, to see if the card is
1403 * responding at all normally.
1404 */
1405 timeout = jiffies + 5*HZ/100;
1406 okay = 0;
1407 while (time_before(jiffies, timeout) && !(inb_status(dev->base_addr) & HCRE));
1408 if ((inb_status(dev->base_addr) & HCRE)) {
1409 outb_command(0, dev->base_addr); /* send a spurious byte */
1410 timeout = jiffies + 5*HZ/100;
1411 while (time_before(jiffies, timeout) && !(inb_status(dev->base_addr) & HCRE));
1412 if (inb_status(dev->base_addr) & HCRE)
1413 okay = 1;
1414 }
1415 if (!okay) {
1416 /* Nope, it's ignoring the command register. This means that
1417 * either it's still booting up, or it's died.
1418 */
1419 printk(KERN_ERR "%s: command register wouldn't drain, ", dev->name);
1420 if ((inb_status(dev->base_addr) & 7) == 3) {
1421 /* If the adapter status is 3, it *could* still be booting.
1422 * Give it the benefit of the doubt for 10 seconds.
1423 */
1424 printk("assuming 3c505 still starting\n");
1425 timeout = jiffies + 10*HZ;
1426 while (time_before(jiffies, timeout) && (inb_status(dev->base_addr) & 7));
1427 if (inb_status(dev->base_addr) & 7) {
1428 printk(KERN_ERR "%s: 3c505 failed to start\n", dev->name);
1429 } else {
1430 okay = 1; /* It started */
1431 }
1432 } else {
1433 /* Otherwise, it must just be in a strange
1434 * state. We probably need to kick it.
1435 */
1436 printk("3c505 is sulking\n");
1437 }
1438 }
1439 for (tries = 0; tries < 5 && okay; tries++) {
1440
1441 /*
1442 * Try to set the Ethernet address, to make sure that the board
1443 * is working.
1444 */
1445 adapter->tx_pcb.command = CMD_STATION_ADDRESS;
1446 adapter->tx_pcb.length = 0;
1447 cookie = probe_irq_on();
1448 if (!send_pcb(dev, &adapter->tx_pcb)) {
1449 printk(KERN_ERR "%s: could not send first PCB\n", dev->name);
1450 probe_irq_off(cookie);
1451 continue;
1452 }
1453 if (!receive_pcb(dev, &adapter->rx_pcb)) {
1454 printk(KERN_ERR "%s: could not read first PCB\n", dev->name);
1455 probe_irq_off(cookie);
1456 continue;
1457 }
1458 if ((adapter->rx_pcb.command != CMD_ADDRESS_RESPONSE) ||
1459 (adapter->rx_pcb.length != 6)) {
1460 printk(KERN_ERR "%s: first PCB wrong (%d, %d)\n", dev->name, adapter->rx_pcb.command, adapter->rx_pcb.length);
1461 probe_irq_off(cookie);
1462 continue;
1463 }
1464 goto okay;
1465 }
1466 /* It's broken. Do a hard reset to re-initialise the board,
1467 * and try again.
1468 */
1469 printk(KERN_INFO "%s: resetting adapter\n", dev->name);
1470 outb_control(adapter->hcr_val | FLSH | ATTN, dev);
1471 outb_control(adapter->hcr_val & ~(FLSH | ATTN), dev);
1472 }
1473 printk(KERN_ERR "%s: failed to initialise 3c505\n", dev->name);
1474 goto out;
1475
1476 okay:
1477 if (dev->irq) { /* Is there a preset IRQ? */
1478 int rpt = probe_irq_off(cookie);
1479 if (dev->irq != rpt) {
1480 printk(KERN_WARNING "%s: warning, irq %d configured but %d detected\n", dev->name, dev->irq, rpt);
1481 }
1482 /* if dev->irq == probe_irq_off(cookie), all is well */
1483 } else /* No preset IRQ; just use what we can detect */
1484 dev->irq = probe_irq_off(cookie);
1485 switch (dev->irq) { /* Legal, sane? */
1486 case 0:
1487 printk(KERN_ERR "%s: IRQ probe failed: check 3c505 jumpers.\n",
1488 dev->name);
1489 goto out;
1490 case 1:
1491 case 6:
1492 case 8:
1493 case 13:
1494 printk(KERN_ERR "%s: Impossible IRQ %d reported by probe_irq_off().\n",
1495 dev->name, dev->irq);
1496 goto out;
1497 }
1498 /*
1499 * Now we have the IRQ number so we can disable the interrupts from
1500 * the board until the board is opened.
1501 */
1502 outb_control(adapter->hcr_val & ~CMDE, dev);
1503
1504 /*
1505 * copy Ethernet address into structure
1506 */
1507 for (i = 0; i < 6; i++)
1508 dev->dev_addr[i] = adapter->rx_pcb.data.eth_addr[i];
1509
1510 /* find a DMA channel */
1511 if (!dev->dma) {
1512 if (dev->mem_start) {
1513 dev->dma = dev->mem_start & 7;
1514 }
1515 else {
1516 printk(KERN_WARNING "%s: warning, DMA channel not specified, using default\n", dev->name);
1517 dev->dma = ELP_DMA;
1518 }
1519 }
1520
1521 /*
1522 * print remainder of startup message
1523 */
Joe Perches0795af52007-10-03 17:59:30 -07001524 printk(KERN_INFO "%s: 3c505 at %#lx, irq %d, dma %d, "
1525 "addr %s, ",
1526 dev->name, dev->base_addr, dev->irq, dev->dma,
1527 print_mac(mac, dev->dev_addr));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001528
1529 /*
1530 * read more information from the adapter
1531 */
1532
1533 adapter->tx_pcb.command = CMD_ADAPTER_INFO;
1534 adapter->tx_pcb.length = 0;
1535 if (!send_pcb(dev, &adapter->tx_pcb) ||
1536 !receive_pcb(dev, &adapter->rx_pcb) ||
1537 (adapter->rx_pcb.command != CMD_ADAPTER_INFO_RESPONSE) ||
1538 (adapter->rx_pcb.length != 10)) {
1539 printk("not responding to second PCB\n");
1540 }
1541 printk("rev %d.%d, %dk\n", adapter->rx_pcb.data.info.major_vers, adapter->rx_pcb.data.info.minor_vers, adapter->rx_pcb.data.info.RAM_sz);
1542
1543 /*
1544 * reconfigure the adapter memory to better suit our purposes
1545 */
1546 adapter->tx_pcb.command = CMD_CONFIGURE_ADAPTER_MEMORY;
1547 adapter->tx_pcb.length = 12;
1548 adapter->tx_pcb.data.memconf.cmd_q = 8;
1549 adapter->tx_pcb.data.memconf.rcv_q = 8;
1550 adapter->tx_pcb.data.memconf.mcast = 10;
1551 adapter->tx_pcb.data.memconf.frame = 10;
1552 adapter->tx_pcb.data.memconf.rcv_b = 10;
1553 adapter->tx_pcb.data.memconf.progs = 0;
1554 if (!send_pcb(dev, &adapter->tx_pcb) ||
1555 !receive_pcb(dev, &adapter->rx_pcb) ||
1556 (adapter->rx_pcb.command != CMD_CONFIGURE_ADAPTER_RESPONSE) ||
1557 (adapter->rx_pcb.length != 2)) {
1558 printk(KERN_ERR "%s: could not configure adapter memory\n", dev->name);
1559 }
1560 if (adapter->rx_pcb.data.configure) {
1561 printk(KERN_ERR "%s: adapter configuration failed\n", dev->name);
1562 }
1563
1564 dev->open = elp_open; /* local */
1565 dev->stop = elp_close; /* local */
1566 dev->get_stats = elp_get_stats; /* local */
1567 dev->hard_start_xmit = elp_start_xmit; /* local */
1568 dev->tx_timeout = elp_timeout; /* local */
1569 dev->watchdog_timeo = 10*HZ;
1570 dev->set_multicast_list = elp_set_mc_list; /* local */
1571 dev->ethtool_ops = &netdev_ethtool_ops; /* local */
1572
Linus Torvalds1da177e2005-04-16 15:20:36 -07001573 dev->mem_start = dev->mem_end = 0;
1574
1575 err = register_netdev(dev);
1576 if (err)
1577 goto out;
1578
1579 return 0;
1580out:
1581 release_region(dev->base_addr, ELP_IO_EXTENT);
1582 return err;
1583}
1584
1585#ifndef MODULE
1586struct net_device * __init elplus_probe(int unit)
1587{
1588 struct net_device *dev = alloc_etherdev(sizeof(elp_device));
1589 int err;
1590 if (!dev)
1591 return ERR_PTR(-ENOMEM);
1592
1593 sprintf(dev->name, "eth%d", unit);
1594 netdev_boot_setup_check(dev);
1595
1596 err = elplus_setup(dev);
1597 if (err) {
1598 free_netdev(dev);
1599 return ERR_PTR(err);
1600 }
1601 return dev;
1602}
1603
1604#else
1605static struct net_device *dev_3c505[ELP_MAX_CARDS];
1606static int io[ELP_MAX_CARDS];
1607static int irq[ELP_MAX_CARDS];
1608static int dma[ELP_MAX_CARDS];
1609module_param_array(io, int, NULL, 0);
1610module_param_array(irq, int, NULL, 0);
1611module_param_array(dma, int, NULL, 0);
1612MODULE_PARM_DESC(io, "EtherLink Plus I/O base address(es)");
1613MODULE_PARM_DESC(irq, "EtherLink Plus IRQ number(s) (assigned)");
1614MODULE_PARM_DESC(dma, "EtherLink Plus DMA channel(s)");
1615
Randy Dunlap96e672c2006-06-10 13:33:48 -07001616int __init init_module(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001617{
1618 int this_dev, found = 0;
1619
1620 for (this_dev = 0; this_dev < ELP_MAX_CARDS; this_dev++) {
1621 struct net_device *dev = alloc_etherdev(sizeof(elp_device));
1622 if (!dev)
1623 break;
1624
1625 dev->irq = irq[this_dev];
1626 dev->base_addr = io[this_dev];
1627 if (dma[this_dev]) {
1628 dev->dma = dma[this_dev];
1629 } else {
1630 dev->dma = ELP_DMA;
1631 printk(KERN_WARNING "3c505.c: warning, using default DMA channel,\n");
1632 }
1633 if (io[this_dev] == 0) {
1634 if (this_dev) {
1635 free_netdev(dev);
1636 break;
1637 }
1638 printk(KERN_NOTICE "3c505.c: module autoprobe not recommended, give io=xx.\n");
1639 }
1640 if (elplus_setup(dev) != 0) {
1641 printk(KERN_WARNING "3c505.c: Failed to register card at 0x%x.\n", io[this_dev]);
1642 free_netdev(dev);
1643 break;
1644 }
1645 dev_3c505[this_dev] = dev;
1646 found++;
1647 }
1648 if (!found)
1649 return -ENODEV;
1650 return 0;
1651}
1652
Al Viroafc8eb42006-06-14 18:50:53 -04001653void __exit cleanup_module(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001654{
1655 int this_dev;
1656
1657 for (this_dev = 0; this_dev < ELP_MAX_CARDS; this_dev++) {
1658 struct net_device *dev = dev_3c505[this_dev];
1659 if (dev) {
1660 unregister_netdev(dev);
1661 release_region(dev->base_addr, ELP_IO_EXTENT);
1662 free_netdev(dev);
1663 }
1664 }
1665}
1666
1667#endif /* MODULE */
1668MODULE_LICENSE("GPL");